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LD1085 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. LD1085
Description  3A Low drop positive voltage regulator adjustable and fixed
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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LD1085 Datasheet(HTML) 1 Page - STMicroelectronics

 
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June 2007
Rev. 18
1/27
27
LD1085 series
3A Low drop positive voltage regulator adjustable and fixed
Features
Typical dropout 1.3V (at 3A)
Three terminal adjustable or fixed output
voltage 1.5V, 1.8V, 2.5V, 3.3V, 5V, 12V.
Guaranteed output current up to 3A
Output tolerance ±1% at 25°C and ±2% in full
temperature range
Internal power and thermal limit
Wide operating temperature range -40°C to
125°C
Package available: TO-220, TO-220FP,
DPAK, D2PAK, D2PAK/A
Pinout compatibility with standard adjustable
VREG
Description
The LD1085 is a LOW DROP Voltage Regulator
able to provide up to 3A of Output Current.
Dropout is guaranteed at a maximum of 1.2V at
the maximum output current, decreasing at lower
loads. The LD1085 is pin to pin compatible with
the older 3-terminal adjustable regulators, but has
better performances in term of drop and output
tolerance.
A 2.85V output version is suitable for SCSI-2
active termination. Unlike PNP regulators, where
a part of the output current is wasted as quiescent
current, the LD1085 quiescent current flows into
the load, so increase efficiency. Only a 10µF
minimum capacitor is need for stability.
The device is supplied in TO-220, TO-220FP,
DPAK, D2PAK and D2PAK/A. On chip trimming
allows the regulator to reach a very tight output
voltage tolerance, within ±1% at 25°C.
TO-220FP
D2PAK/A
TO-220
D2PAK
DPAK
www.st.com
Schematic diagram


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